Stereo & Electronics - Alarm

My grandma has a 97 Camry that she gave to my family. It has a Prime Security alarm on it. The batteries are new in the remote controls and the little red light on it lights up. It worked till bout a year ago it just stopped. Does anyone know how i could reset it for it to work?

check the fuses on the alarm wire going to 12v constant and check your ground wires. Could also just be a bad antenna or brain---i had a 3 month old dei product with a bad antenna in the shop 2 days ago.